Spatially resolved oxymetry
First Claim
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1. An optical examination apparatus for optical examination of an object of interest, the optical examination apparatus comprising:
- a detector unit adapted for detecting first radiation and second radiation from the object of interest in response to light emitted from an optical radiation source propagating through the object of interest, the first radiation and the second radiation providing first detection data and second detection data, respectively; and
a determination unit adapted for determining spatially resolved information relating to the object of interest based on the first detection data and the second detection data,wherein the first detection data corresponds to a first oxygen concentration inside the object of interest,wherein the second detection data corresponds to a second oxygen concentration inside the object of interest, which is different from the first oxygen concentration, andwherein the spatially resolved information relating to the object of interest is determined using a ratio of the first detection data and the second detection data for calibration.
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Abstract
In optical tomography, a calibration of the data may be necessary for image reconstruction. According to an exemplary embodiment of the present invention, the object of interest is used for calibration, wherein the image data is acquired during a highly oxygenated phase of the object of interest and wherein the calibration data is acquired during a low oxygenated phase of the object of interest. This may provide for an improved calibration, resulting in improved image quality.
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Citations
18 Claims
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1. An optical examination apparatus for optical examination of an object of interest, the optical examination apparatus comprising:
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a detector unit adapted for detecting first radiation and second radiation from the object of interest in response to light emitted from an optical radiation source propagating through the object of interest, the first radiation and the second radiation providing first detection data and second detection data, respectively; and a determination unit adapted for determining spatially resolved information relating to the object of interest based on the first detection data and the second detection data, wherein the first detection data corresponds to a first oxygen concentration inside the object of interest, wherein the second detection data corresponds to a second oxygen concentration inside the object of interest, which is different from the first oxygen concentration, and wherein the spatially resolved information relating to the object of interest is determined using a ratio of the first detection data and the second detection data for calibration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of examining an object of interest with an optical examination apparatus, the method comprising:
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detecting light from the object of interest, responsive to optical radiation from an optical radiation source propagating through the object of interest, the detected light comprising first detection data and second detection data; and determining spatially resolved information relating to the object of interest based on the first detection data and the second detection data, wherein the first detection data corresponds to a first oxygen concentration inside the object of interest while the primary optical radiation propagates through the object of interest, wherein the second detection data corresponds to a second oxygen concentration inside the object of interest, which is different from the first oxygen concentration, while the primary optical radiation propagates through the object of interest, and wherein determining the spatially resolved information relating to the object of interest comprises; determining a ratio between the first detection data and the second detection data for calibration; and reconstructing an image of the object of interest based on the ratio. - View Dependent Claims (18)
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15. An image processing device for examining an object of interest with an optical examination apparatus, the image processing device comprising:
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a memory for storing first detection data and second detection data obtained from light propagating through the object of interest emitted by an optical radiation source; and a determination unit adapted for determining spatially resolved information relating to the object of interest based on the first detection data and the second detection data; wherein the first detection data corresponds to a first oxygen concentration inside the object of interest; and wherein the second detection data corresponds to a second oxygen concentration inside the object of interest, which is different from the first oxygen concentration.
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16. A computer-readable medium, in which a computer program for examining an object of interest with an optical examination apparatus is stored which, when being executed by a processor, is adapted to carry out the steps of:
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detecting light from the object of interest, responsive to optical radiation emitted by an optical radiation source and propagating through the object of interest, the detected light comprising first detection data and second detection data; and determining spatially resolved information relating to the object of interest based on the first detection data and the second detection data; wherein the first detection data corresponds to a first oxygen concentration inside the object of interest while the optical radiation propagates through the object of interest; and wherein the second detection data corresponds to a second oxygen concentration inside the object of interest, which is different from the first oxygen concentration, while the optical radiation propagates through the object of interest.
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17. A program element of examining an object of interest, which, when being executed by a processor, is adapted to carry out the steps of:
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detecting light from the object of interest, responsive to optical radiation emitted by an optical radiation source and propagating through the object of interest, the detected light comprising first detection data and second detection data; and determining spatially resolved information relating to the object of interest based on the first detection data and the second detection data; wherein the first detection data corresponds to a first oxygen concentration inside the object of interest while the optical radiation propagates through the object of interest; and wherein the second detection data corresponds to a second oxygen concentration inside the object of interest, which is different from the first oxygen concentration, while the optical radiation propagates through the object of interest.
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Specification